Yen locality B5 (Eocene of the United States)

Where: Natrona County, Wyoming (43.4° N, 107.4° W: paleocoordinates 47.0° N, 93.1° W)

• coordinate stated in text

When: Wind River Formation, Bridgerian (50.3 - 46.2 Ma)

• no formation given in original publication, but area now mapped as Wind River Formation; age interpreted as Bridgerian based on molluscans

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: T.-C. Yen. 1948. Eocene fresh-water Mollusca from Wyoming. Journal of Paleontology 22(5):634-640 [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 191226: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.01.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pulmonata - Pupillidae
 Basommatophora - Planorbidae
Australorbis spectabilis Meek 1860 pulmonate
 Basommatophora - Physidae
 Basommatophora - Lymnaeidae
Lymnaea similis pulmonate
Lymnaea vetusta pulmonate
Lymnaea sp. Lamarck 1799 pulmonate